

public class test{
    public static void main(String[] args){
        String h = "hello ";
        String w = "world";
        System.out.println(h+w);
    }
}

//public class test {
//
//    public static void main1(String[] args){
//        //代码1
////        byte a = 1;
////        byte b = 2;
////        byte c = (byte)(a+b);
////        System.out.println(c);
//    }
//}
